Abstract
We report on the modifications of spin waves in a ferromagnetic double layer structure that are driven by in-plane dc electric currents within the spacer layer. These changes, which are monitored by Brillouin light scattering, are accounted for by the spatial variations of magnetic field and magnetization within the magnetic structure resulting from the Amperian field generated by current densities as high as $4\ifmmode\times\else\texttimes\fi{}{10}^{7}{\mathrm{A}/\mathrm{c}\mathrm{m}}^{2}.$ Calculations of the spin-wave frequencies and spatial distribution of their amplitudes describe the transformations to the Brillouin spectra with injection current.
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